Oxygen inhalation is not very useful for improving blood clots, but it is beneficial for the body’s lack of oxygen caused by incomplete obstruction of blood vessels caused by blood clots. Thrombosis is caused by atherosclerotic plaque resulting in blockage of blood vessels, partial or complete blockage of blood flow, resulting in ischemia and necrosis of tissue cells. Therefore, oxygen inhalation does not have much effect on improving thrombosis, and thrombolytic therapy should be carried out in time. But oxygen inhalation has a certain effect on the situation that blood vessels are not yet completely obstructed due to thrombus. Oxygen inhalation can significantly improve the patient’s symptoms such as inattention, dizziness, and unconsciousness caused by hypoxia. When patients need to give oxygen, they should follow the doctor’s instructions to control the time of oxygen intake, oxygen flow rate, etc., and should not blindly inhale oxygen. If there is any discomfort, it is recommended to go to the hospital for treatment in time.